That said, the circumstantial evidence is compelling. Firstly, the house's location would have been an excellent place to hide slaves. It was near the Mississippi River and therefore provided easy access to steamboats (many runaway slaves headed north via the river). Also, getting to the house at that time was easy as one had to travel east then loop back towards it. And the basement would have been a good place to hide slaves. Additionally, in the late 1980s, an EPA employee, Otis Johnson Jr., researched property that he owned. The neighbors around the house told him stories passed down to them about Burkle's role in the Underground Railroad. Another piece of evidence comes from Bill Day, former owner of the Hunt-Phelan House (this is its own Clio entry). As a child, he was tutored by Katherine Compton, Burkle's granddaughter. She told him that Burkle housed escaped slaves and even showed him a letter from a former slave—who found freedom in Canada—thanking Burkle. However, Katherine apparently burned the letter and other documents, thereby likely destroying the only sources of real evidence proving Burkle's role.